Want to see how much difference a good windscreen makes to sound quality? Here's a Zoom H4n with no windscreen, the supplied windscreen and a Redhead windscreen. Clearly the redhead screen is far and away the best of the bunch.
No processing to sound other than to fade in the track from a clean source at the end.

Music is "Dangling Threads" by the brilliant Howard Eliott Payne, from the album "Bright light ballads"

Filmed on an EOS 5D Mark II.

Note the use of the most brilliant Gorillapod to hold the Zoom as well - this is wrapped around a balcony on the third floor with a 30ft drop to concrete below - that's how much I trust them!

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